any merit in running dual battery packs ?

[Ed Alt]

As I recall, the diode bypass for open cells only worked on setups that used the new-fangled bridge amplifier servo designs, i.e., anything using the old center tapped 4 wire designs couldn't be saved with the diode bypass. I could have used it one day on my old Skylark 56 (2nd RC plane ever for me) with a Kraft Series 70. It did a nice spin-in that day, though it lost points for shoulder rolling into it as that one cell coughed its last and all the servos crept over to their final resting spot. 

EK Logictrol had one of the earliest bridge amplifier servos.  My instructor had one when I got into RC, I think it was late 1969 and he was already using their little linear rack, 3 wire servos.  I can't remember the model number for them, but they were really the cats a$$ back then.  I could be wrong, but it might have been EK that first did the diode bypass in the battery pack. The memory is a bit fuzzy on that though.

Ed
  ----- Original Message ----- 
  From: Bob Richards 
  To: discussion at nsrca.org 
  Sent: Monday, January 24, 2005 3:25 PM
  Subject: RE: any merit in running dual battery packs ?


  Dean,

  I did not know Orbit did that. I know Proline did. I loved those Competition single-stick radios.

  Bob R.

  Dean Pappas <d.pappas at kodeos.com> wrote:
    Hi Ron,
    Nickel tends to fail short. That's actually good. Once upon a time, Orbit sold its packs with diodes across each cell to protect against failed-open cells.
     Try the Smart-Fly BATshare ... same bat time, same bat channel!
    http://www.smart-fly.com/Products/BatShare/batshare.htm

    later,
        Dean
    Dean Pappas 
    Sr. Design Engineer 
    Kodeos Communications 
    111 Corporate Blvd. 
    South Plainfield, N.J. 07080 
    (908) 222-7817 phone 
    (908) 222-2392 fax 
    d.pappas at kodeos.com 

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